package com.example.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.reggie.common.CustomException;
import com.example.reggie.common.R;
import com.example.reggie.dto.SetmealDto;
import com.example.reggie.entity.Setmeal;
import com.example.reggie.entity.SetmealDish;
import com.example.reggie.mapper.SetmealMapper;
import com.example.reggie.service.SetmealDishService;
import com.example.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: 老肥！！！
 * @Date: 2022/09/14/20:24
 * @Description: 不想学代码了！！！
 */
@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {
    @Autowired
    private SetmealDishService setmealDishService;
    //    新增套餐
    @Override
    @Transactional//事务注解
    public void saveWithDish(SetmealDto setmealDto) {
// 保存套餐的基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        for (SetmealDish setmealDish:setmealDishes){
            setmealDish.setSetmealId(setmealDto.getId());
        }
        //保存套餐和菜品的关联信息，操作setmeal_dish，执行insert操作
        setmealDishService.saveBatch(setmealDishes);//批量操作
    }

    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
//        查询套餐状态，确定是否可删除
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);

        int count = this.count(queryWrapper);
        if(count > 0){
//            如果不能删除，抛出一个业务异常
            throw  new CustomException("套餐正在售卖中，不能删除");
        }
//        如果可以删除，先删除套餐表中的数据--setmeal
        this.removeByIds(ids);

        LambdaQueryWrapper<SetmealDish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(SetmealDish::getSetmealId,ids);
//        删除关系表中的数据-----setmeal_dish
        setmealDishService.remove(lambdaQueryWrapper);
    }
// 修改套餐状态
    @Override
    public boolean batchUpdateStatus(Integer status, List<Long> ids) {
        LambdaQueryWrapper<Setmeal> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(ids!=null,Setmeal::getId,ids);
        List<Setmeal> list = this.list(queryWrapper);

        if (list != null){
            for(Setmeal setmeal : list){
                setmeal.setStatus(status);
                this.updateById(setmeal);
            }
            return true;
        }else{
            return false;
        }

    }

    @Override
    public SetmealDto getByIdWithDish(Long id) {
        Setmeal setmeal = this.getById(id);
        SetmealDto setmealDto = new SetmealDto();
//        对象拷贝
        BeanUtils.copyProperties(setmeal,setmealDto);
//        查询关联表setmeal_dish的菜品信息
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,id);
        List<SetmealDish> setmealDishes = setmealDishService.list(queryWrapper);
//        设置套餐菜品属性
        setmealDto.setSetmealDishes(setmealDishes);
        return setmealDto;
    }

    @Override
    public void updateWithDish(SetmealDto setmealDto) {
//        保存setmeal表中的基本数据
        this.updateById(setmealDto);
//        删除原来的套餐数据
        LambdaQueryWrapper<SetmealDish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SetmealDish::getSetmealId,setmealDto.getId());
        setmealDishService.remove(queryWrapper);
//        更新关联表
        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
//        item为SetmealDish对象
        setmealDishes = setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return  item;
        }).collect(Collectors.toList());
    setmealDishService.saveBatch(setmealDishes);
    }



}
